With the discovery of the Higgs Boson, some have been calling it the end of experimental particle physics for our generation, due to the fact that all of the particles predicted by the standard model ...

Let's consider an electron-positron pair with total spin equal to zero. When it annihilates it can not emit only one photon because it would have zero momentum and nonzero energy. The pair emits two ...

I am studying the decay of D0->K+K- and I calculated the result of Branching Ratio by Naive QCD and I wrote all the equations for amplitude and branching Ration and Hamiltonian and... for this decay ...

Physicists have detected an amazing variety of energetic phenomena in the universe, including beams of particles of unexpectedly high energy but of unknown origin. In laboratory accelerators, we can ...

Intuitively, it seems as though the reason would be a small value for the coupling constant, as the probability for emitting $W^{-}$ bosons would be low. However, it's value is almost the same as the ...

Consider an $\mathcal{N}=1$ left-handed chiral supermultiplet. The particle content is
$$L = (\phi\quad e_L) $$
where $\phi$ is a complex scalar and $e_L$ a left handed Weyl fermion.
People usually ...

Chern bands or Chern insulators in 2 spatial dimensional(2D) are a way to construct the bulk insulating gap, but with edge or surfaces with gapless fermions. Such gapless fermions are emergent, and ...

This question is more a philosophical question than a physics one.
When we appreciate particle physics we study that in order to explain some experimental results we have to introduce a new particle ...

Any state analytic in energy (which includes most physical states since they have bounded energy) contains non-local correlations described by the Reeh-Schlieder theorem in AQFT. It is further shown ...

Imagine that one has induced a persistent current in a superconducting loop.
If a particle interacted with an electron in one of the Cooper pairs then would some decoherence and dissipation occur?
I ...

How does one write down the following Dirac mass term for a collection of "massive" neutrinos?
\begin{equation}
-[\overline{(\psi_R)}M_D\psi_L+\overline{(\psi_L})M^\dagger_D\psi_R]
\end{equation}
I ...

The symmetry of the standard model between the fermions and each generation of them is strongly suggestive of components as proposed in the Rishon model. Having discovered the Higgs boson, we know the ...

Consider the plot below, showing the running of different masses due to renormalization for a certain point of the (c)MSSM. I am able to exactly reproduce the plot, including the running of M1, M2, ...

My current research involves making a prediction for data collected by the TOTEM experiment at the LHC. The experiment is primarily designed to measure the total inelastic and elastic scattering cross ...

What is the current state of the hypothesis of mirror matter today?
Are there any experimental data or theoretical arguments that exclude it by now, or is it still considered viable among physicists?
...

recently when I was studying the scatterings which involves a vector boson (like W boson) as an intermediate particle, I saw that the propagator is not Lorentz invariant, I read that there is another ...